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2nd EAGE North African/Mediterranean Petroleum & Geosciences Conference & Exhibition
- Conference date: 10 Apr 2005 - 13 Apr 2005
- Location: Algiers, Algeria
- ISBN: 978-90-73781-38-2
- Published: 10 April 2005
81 - 100 of 100 results
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Distribution and Conservation Conditions of Hydrocarbons in Ahnet and Timimoun Basins (Algeria)
Authors I. Maarouf and R. LounissiP17 DISTRIBUTION AND CONSERVATION CONDITIONS OF HYDROCARBONSIN AHNET AND TIMIMOUN BASINS (ALGERIA) Introduction: 1 The Ahnet and Timimoun basins are located in the Central Algerian Sahara (fig.1). Petroleum exploration in this area started in the 50’s. It led to important gas fields discovery such as Krechba Teguentour Reg In Salah... The petroleum reservoirs are represented by the sandy Cambro – Ordovician Lower Devonian and Strunian – Tournaisian sediments. This study aims to document the distribution and conservation conditions of hydrocarbons. Cambro-Ordovician Reservoirs: Fig.1: Location map of Ahnet and Timimoun basins I. MAAROUF ¹ and R. LOUNISSI² ¹SONATRACH Exploration Boumérdès Avenue
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Complete Mechanical Description of Anisotropic Sedimentary Rocks – Experiments Versus Theory
Authors L. Azoune and P.N.J. RasolofosaonP18 COMPLETE MECHANICAL DESCRIPTION OF ANISOTROPIC SEDIMENTARY ROCKS – EXPERIMENTS VERSUS THEORY Summary 1 Many experimental results show that rocks are anisotropic with respect to elastic properties in other words elastic properties depends on the direction of the measurement. The rocks can also exhibit a strong non-linear elastic answer with hysteresis which appears in various ways (non-linear stress-strain loops and the deformation of the peaks of resonances in a test of bar of resonance…). In this this paper we make a test of a model that synthesizes these two behaviours. The agreement between the theoretical predictions and the experimental data
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Gas Detection by AVO and Seismic Attributes Allal High – Algeria
Authors M. Hassaim and A. BellahceneP19 1 GAS DETECTION BY AVO AND SEISMIC ATTRIBUTES ALLAL HIGH - ALGERIA M. HASSAIM* A. BELLAHCENE * * SONATRACH - Division Exploration - Boumerdes - 35000 Algérie Abstract This poster shows the results obtained by an AVO analysis and a seismic attributes study on two seismic lines A1 and B1 located in the Allal high in central part of the Algerian Saharan platform (see figure below). Issues and objectives In the studied area three wells are located over the same structure where the principal objective for these wells is the Strunian (Upper Devonian). The first well well A was
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Rheological Behaviour of New Polymers Used in Water Based Drilling Muds and Peformances
Authors N. Kherfellah, K. Bekkour and S. BenhadidP20 RHEOLOGICAL BEHAVIOUR OF NEW POLYMERS USED IN WATER BASED DRILLING MUDS AND PEFORMANCES 1 A laboratory study has been undertaken to elucidate the influence of structural parameters of polymer/electrolyte systems commonly used for the formulation of water-based drilling fluids on their performances as filtrate reducers or viscosifiers.High temperatures and salt conditions encountered in the well may modify the rheological properties and this makes the use of polymers necessary. High molecular weight polymers (XC gums polyacrylamides have been used in the formulation of waterbased drilling fluids for reducing filtration facilitating clay stabilisation improving débris suspension capacity and drillstring lubrication in
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Near Surface Model for Regional Lines
Authors M. Al-Homaili, R. Bridle, R. Ley and J. McNeelyP21 NEAR SURFACE MODEL FOR REGIONAL LINES Abstract 1 This paper describes a case study of the evolution of the near surface model for an area in Saudi Arabia. Previous to the current acquisition program there have been many vintages of 2D seismic with datum correction statics being derived from many methods. Hence there has been considerable difficulty associated with the ties to the archived seismic data. This evolved method is consistent with our approach to tie all seismic data to a single datum with the best possible time image. Introduction The topography of the study area is varied exhibiting
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Dimeta West Gas Reservoir Communication Study Using Interference Tests Results
More LessP22 DIMETA WEST GAS RESERVOIR COMMUNICATION STUDY USING INTERFERENCE TESTS RESULTS 1 ABSTRACT Interference testing is a pressure transient measurement technique used to study the interaction between wells in a reservoir and to measure reservoir parameters and understanding vertical flow behaviour and the directional flow properties. This parameters are essential for proper reservoir management particularly for completion decision . This paper discusses the analyses of transient pressure data that has been measured during multi well interference tests performed in wells producing gas of the Devonian formation F6 (unite B and A) in Dimeta west gas filed located in the north-eastern
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The Structural Evolution of the Hodna Basin and Its Impact on the Hydrocarbon Distribution, Algeria
Authors H.L. Kheidri and K. HamoudiP23 THE STRUCTURAL EVOLUTION OF THE HODNA BASIN AND ITS IMPACT ON THE HYDROCARBON DISTRIBUTION ALGERIA 1 H.L. KHEIDRI and K. HAMOUDI Sonatrach AMT/EXP. Algeria Introduction The Hodna basin belongs to the Maghrebides outer zones the southern section of the Alpine foldbelt.It is located across the tellian nappes in the north and foreland hodnean type in the south. This latter disappears northward under the tellian nappes (Fig 1). The Oued Gueterini field (Sidi Aïssa area) constitutes the first discovered oil field in Algeria producing from the tellian nappes. The Eocene limestones in the tellian nappes constitute the main reservoirs levels
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The Medjerda Valley (N. Tunisia) Triassic Complex – Updated Biostratigraphy and Geodynamics Revisited
Authors M.M. Ben Slama, A. Masrouhi, M. Ghanmi, M. Ben Youssef and F. Zargouni1 P24 The Medjerda Valley (N. Tunisia) Triassic complex: updated biostratigraphy and Geodynamics revisited BEN SLAMA Mohamed Montassar 1 MASROUHI Amara 1 GHANMI Mohamed 1 BEN YOUSSEF Mohamed 2 & ZARGOUNI Fouad 1 1 Département de géologie Faculté des Sciences de Tunis 1060 El Manar II Tunis Tunisie 2 INRST Hammam Lif Tunisie Key word: Medjerda valley north Tunisia Triassic Albian composite salt glacier The two studied outcrops of the Triassic deposits are located about 2 Km eastward the Slouguia village where are separated by the main road GP leading to Testour (NW Tunisia)(Fig1). They were first investigated by Solignac
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Hydrocarbon Potential of the Sedimentary Border of the Eglabs, Southern Part of Reggane Basin, Algeria
By M. DaoudiP25 HYDROCARBON POTENTIAL OF THE SEDIMENTARY BORDER OF THE EGLABS SOUTHERN PART OF REGGANE BASIN ALGERIA Abstract 1 The research for new hydrocarbon fields within the present hydrocarbon context is oriented toward areas which haven’t been explored so far or with unidentified hydrocarbon potential. That is the case of the sedimentary part of the “Eglab” range. This part of the “Eglab range” is located half in Mauritania (Yetti and Iguidi pro part) and half in Algeria (Yetti Iguidi pro part and Eglab) (fig.1). Infracambrian sequence (Menchikoff N. ) is not well understood even if there existence and hydrocarbon maturity have
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Unconventional Shale Gas Exploration – An Economic Resource for Natural Gas Production
By D.M. JarvieP26 UNCONVENTIONAL SHALE GAS EXPLORATION – AN ECONOMIC RESOURCE FOR NATURAL GAS PRODUCTION Unconventional gas resources are an underutilized strategic resource for countries and exploration companies alike. These producible hydrocarbon resources are often ignored except for their hydrocarbon source potential for conventional reservoirs. Unconventional shale gas is one such resource. Intervals through sili-clastic source rocks often have demonstrable amounts of “shale gas” and this is indeed an indication of the possibility of production from these shales. 1 These resources are classified as unconventional based on their very low permeability (<1 mD) the absence of conventional traps their continuous nature and
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Interpretation of Aeromagnetic Data of South Siwa Area, North Western Desert, Egypt
Authors A. El Khafeef and M.H. SaadP27 INTERPRETATION OF AEROMAGNETIC DATA OF SOUTH SIWA AREA NORTH WESTERN DESERT EGYPT 1 M.H. SAAD and A. A. EL.KHAFEEF Exploration Dep.Egyptian Petroleum Research Institute Nasr City 11727 Cairo Egypt ABSTRACT The main target of this work is essentially concerned with the interpretation of aeromagnetic data for delineating the regional structural configuration and tectonic setting of the buried basement rocks and the overlying sedimentary cover of south Siwa area. A reduced to the pole magnetic map (RTP) was calculated from the total intensity aeromagnetic map. Regional-residual separation was applied on the RTP map using the Fast Fourier Transform (F.F.T) and
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Wavelet Instability – Issues and Risk Management
Authors C. Tsingas, B. Link and S. TrickettP28 WAVELET INSTABILITY – ISSUES AND RISK MANAGEMENT Abstract 1 C. TSINGAS* B. LINK and S. TRICKETT Kelman Technologies Int. 35 Bowes Rd Walton On Thames Surrey UK KT12 3HU. The prevention recognition and correction of lateral wavelet instability is critical to exploration success in stratigraphic plays. A comprehensive series of processing procedures and quality control displays can provide improved risk management and error analysis of this problem. We design our processing flow such that on a routine and consistent basis procedures for the prevention of lateral wavelet instability and its effects are incorporated and analyzed. First we recognize that
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Acquisition and Processing Challenges in Continuous Active Reservoir Monitoring
Authors T. Bianchi, J. Meunier, P. Lanfranchi, F. Huguet and J. BruneauP29 ACQUISITION AND PROCESSING CHALLENGES IN CONTINUOUS ACTIVE RESERVOIR MONITORING Summary A permanent system of reservoir monitoring has been installed on a gas storage field belonging to Gaz de France in the west of Paris. Because of the nature of the reservoir and the small saturation changes the expected 4D seismic signal is extremely low. A new processing method taking advantage of the high temporal data redundancy is presented. Introduction Gaz de France has acquired unique expertise in storing gas in aquifer reservoirs to buffer supply to meet domestic demand. Bubble expansion field pressure and gas saturation must be monitored
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2D Seismic Interpretation and Hydrocarbon Potential of Concession NC7A Ghadames Basin, NW Libya
Authors M.A. Abdullah and A. KojaP30 2D SEISMIC INTERPRETATION AND HYDROCARBON POTENTIAL OF CONCESSION NC7A GHADAMES BASIN NW LIBYA 1 Summary This study focuses on the northeastern Concession NC7 situated in southeastern quarter of the Ghadames Basin Northwest Libya. In the period between 1959 and 1985 gas and oil shows were encountered in this area and commercial hydrocarbon exploration has continued at certain reservoir levels. However no commercial hydrocarbon discovery has been made within certain other reservoir levels. This study sets out to locate any T.W.T structure closure at reservoir horizons; to use seismic data to identify and trace any possible stratigraphic features that may
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Tliouanet Basin Under Basin of Intramontane Basin
By I. DibP31 TLIOUANET BASIN UNDER BASIN OF INTRAMONTANE BASIN 1 Summary- Under Tliouanet basin forms part of under basins filled with sediments Cenozoic post-foldbelt and separated by the mountainous buildings from Western Tell. It under basin is the product of a halocinetic activity; it is the diapir of Kt Bernous post lower Miocene which seems to have controlled sedimentation. The oil objective belongs to upper Miocene post-foldbelt the deposits are continental to tidal with values of porosity of about 20 % and this reservoir produced 30. 000 tons of oil. In other intramontane basins the important discovered ones were carried out
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Reservoir Quality Modelling in Cambro-Ordovician Sands of the Tiguentourine Field, Illizi Basin, Algeria
Authors A. Hutchison, S. Haddad and C. SmalleyP32 RESERVOIR QUALITY MODELLING IN CAMBRO-ORDOVICIAN SANDS OF THE TIGUENTOURINE GAS FIELD ILLIZI BASIN ALGERIA 1 S. HADDAD¹ C. SMALLEY² and A. HUTCHISON² ¹Department Of Earth And Ocean Sciences University of Liverpool Jane Herdman Laboratories 4 Brownlow Street Liverpool L69 3GP ²BP Exploration Chertsey Road Sunbury on Thames Middlesex TW16 7LN. Summary. Reservoir quality prediction is important for the Tiguentourine Field because the permeability is very variable resulting in variable well production rates. Future development wells would benefit from being located in low-risk areas for reservoir quality if these can be predicted. Reservoir quality distribution shows some empirical trends that
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NJORD, Multi Azimuth, Multi Vintage Pre-Stack Depth Migration for Improved Image of Structure and Reservoir – A Case History from Offshore Norway
Authors R. Oezsen, J. McArdle, A. Litvin, E. Sundvor and R. HaugenP33 NJORD MULTI AZIMUTH MULTI VINTAGE STACK DEPTH MIGRATION FOR IMPROVED IMAGE OF STRUCTURE AND RESERVOIR – A CASE HISTORY FROM OFFSHORE NORWAY Summary 1 A multi azimuth and multi vintage pre-stack depth migration (PreSDM) study conducted in the NJORD field offshore Norway significantly improved the image quality in the area of the reservoir over the existing post- and pre-stack time and depth migrations. In this case history we present: ● A description of the existing data sets with different azimuths and vintages in the project area and simulation of a full (multi azimuth) seismic data volume combining limited azimuth
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High Resolution 3D Seismic As a Guide to Improve the Geological Model, TFT-West Field, Ilizi Basin, Algeria
Authors J. Perrot, L. Maurel, J.L. Piazza, C. Gómez, E. Figari and A.M. MessaoudP34 HIGH RESOLUTION 3D SEISMIC AS A GUIDE TO IMPROVE THE GEOLOGICAL MODEL TFT-WEST FIELD ILIZI BASIN ALGERIA Abstract Summary 1 The giant Tin Fouyé Tabankort (TFT) Field is located in the South Ilizi Basin in Algeria about 1000 km South of Algiers. The main objective is the Ordovician tight sands reservoir (infill of paleo-valleys by glacial deposits) sealed by the Silurian shales which produce oil and wet gas. The TFT gas cap was discovered in 1961. Its size is of about 300 GSm3. Its production operated by the Groupement Tin Fouyé Tabankort (GTFT) started in 1999. The current production
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Analysis of Fracturing by Using Grid Based Attributes & Variance Cube
More LessP35 ANALYSIS OF FRACTURING BY USING GRID BASED ATTRIBUTES & VARIANCE CUBE In 2003 a high-resolution 3D survey (400 Km2) was acquired in order to improve the productivity of the TinFouyé Tabankort (TFT) gas-cap field in the Illizi Basin. 1 C. GÓMEZ J. VARELA E. FIGARI J. PERROT G. CHA and D. YAHIAOUI Repsol-Ypf Total Sonatrach TinFouye Tabankort anticline is a structurally complex region composed of several NW-SE & NE-SW structural trends related to regional sub-meridian reverse-strike slip faults. The tectonic history of the region can be summarized in four main stages. After the Pan- African collision and suturing phase
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Gravity Compilation of Libya Project – Stages of Assembly, Interpretation and Project Evaluation
Authors A. Saheel and A. SuleimanP36 GRAVITY COMPILATION OF LIBYA PROJECT – STAGES OF ASSEMBLY INTERPRETATION AND PROJECT EVALUATION 1 Abstract A. SAHEEL and A. SULEIMAN Petroleum Research Center Tripoli- Libya [email protected] [email protected] The gravity compilation of Libya project started back ten years ago by data collection and integration stage. A second stage of the project comprises an additional data and produced a coherent and leveled data set of Bouguer gravity onshore with free air gravity offshore. The data set used throughout the project consisted basically of three types: data already converted to Geodetic Reference System of 1980 (GRS80) from the International Gravity Formula of
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